470 



NEST8 AND EGGS OF 



715. Nest and Eggs of the Rock Wren. (From Tie Nidologist.') 

 Of the common Rock Wren, S. obsoletus. Set No. 781 in Mr. Bryant's collection meas- 

 ures 17x14, 17xl4,.5, 18x14.5, 18.5x14.5 millimeters.* Set No. 782 measures in milli- 

 meters, 19x14, 19x14, 19.5x14.5, 19.5x14.5, 19.5xl5.t The two largest eggs in a series of 

 fifty-two specimens measure 21x15 mm. and 20x16 mm. respectively; the two smallest 

 17x14 mm.; average 19x14 mm.t 



[717.] "WHITE-THROATED WBEII. Caterpes mexieanus (Swains.) Geog. 

 Dist. — Mexico, from Oaxaca and Orizaba northward on the tablelands. Texas 

 (Giraud). 



This bird is similar to the next form, but is dai'ker colored above and below, with 

 a sharper contrast of the white throat; the white speckling mostly confined to the 

 back and wings. It is common to Mexico and its range extends to the Texan border. 

 In all respects its habits, nests and eggs are indistinguishable from those of C. m. 

 conspersiis. 



717o. CANON WEEN. Vatherpes mexieanus conspersus Ridgw. Geog. Dist. — 



Great Basin and Rocky Mountain region.from the SierraNevadaand Cascades eastward 



to Southern Idaho, Wyoming, Colorado and Western Texas; south on the tablelands 



of Mexico to Aguas Calientes. Breeds nearly throughout its range; resident in south- 



erji parts of its range in TJ. S. 



;, XJie rocky canons of the mountain regions throughout its range are the home of 



,, this ai)ecies. It is easily recognized by its white throat and rich yellowish-brown 



,'i t^i}, a,nd,by its noteSi-— a peculiar insect-like chirp, and a delightful clear whistling 



• .67X.55, .6TX.57, ."lx.5", .73X.57. 



t .75X.55, .75X.55, .77X.57, .77x.65, .77X.59. 



t Largest .83x.59 and .79x.63; smallest .67X.55; average .75x.65. 



